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- W4205652812 abstract "测量了线偏振飞秒激光脉冲在空气中成丝产生的氮荧光发射的空间分布. 通过改变激光的偏振方向研究成丝过程中氮荧光发射的径向角分布, 发现<inline-formula><tex-math id=M1>begin{document}${rm{N}}_{{2}}^{{ + }}$end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M1.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M1.png/></alternatives></inline-formula>荧光发射在垂直于激光偏振方向上更强, 而在平行于激光偏振方向上较弱; <inline-formula><tex-math id=M2>begin{document}${{rm{N}}_{{2}}}$end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M2.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M2.png/></alternatives></inline-formula>荧光发射在所有方向上具有近乎相同的强度. 原子和分子的激发、电离等动力学过程受激光强度的影响. 在飞秒激光成丝过程中沿着激光传播方向, 强度呈现先增强后减弱的分布, 从而影响这些过程的产物的空间分布及其荧光发射的空间分布. 沿着激光传播方向, 发现<inline-formula><tex-math id=M3>begin{document}${{rm{N}}_{{2}}}$end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M3.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M3.png/></alternatives></inline-formula>荧光先于<inline-formula><tex-math id=M4>begin{document}${rm{N}}_{{2}}^{{ + }}$end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M4.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M4.png/></alternatives></inline-formula>荧光出现且在<inline-formula><tex-math id=M5>begin{document}${rm{N}}_{{2}}^{{ + }}$end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M5.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M5.png/></alternatives></inline-formula>荧光消失之后消失. 激光强度分布和激光偏振方向均会影响氮荧光的空间分布. 基于实验分析, 在短焦距情况下, 系间窜越过程能很好的解释<inline-formula><tex-math id=M6>begin{document}${{rm{N}}_{{2}}}{{(}}{{rm{C}}^{{3}}}Pi _{rm{u}}^{{ + }})$end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M6.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=13-20201704_M6.png/></alternatives></inline-formula>的形成, 这项研究有助于理解飞秒激光成丝过程中氮荧光发射的产生机制." @default.
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- W4205652812 title "Spatial distribution of nitrogen fluorescence emission induced by femtosecond laser filamentation in air" @default.
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